Steam-generator.



A PATENTED AUG. 4, 1903., F. W. SGHIRMER. E

STEAM GENERATOR.

APPLICATION FILED APB. 4. 1903.

2 SHEETS-SHEET l.

No MODEL.

PATENTED AUG. 4, 1903.

F.l W. SGHIRMER. STEAM GENERATOR. APPLICATION FILED APR. 4, 1903.

' z SHEETS-SHEET 2.

N0 MODEL.

TH; Nowms 1E-raus co. PHoTo-Llwo.. WASHING-rou. u. c.

UNITED STATES atented August 4, 190.

PATENT OFFICE.

FRIEDERICH WILHELM SCHIRMER, OF AUBONNE, SWITZERLAND, ASSIGNOR TO THEFIRMS OF PERROT DUVAL-8500., OF GENEVA, SWITZERLAND, AND COMPTOIRINDUSTRIEL DE BERNE, A. SCI-IOPFER, OF BERNE, SWIT- ZERLAND.

`STEAM-G EN ERATO R.

SPECIFICATION forming part of Letters Patent No. 735,597, dated August4, 1903.

Application led April 4, 1903.

To all whom it may concern:

Be it known that I, FRIEDERIOH WILHELM SOHIRMER, of Aubonne,Switzerland, have invented certain new and useful Improvementsin'Steam-Generators, of which the following is a specication. Y v

My invention relates to steam-generators, and particularly to that classof such devices in which steam is generated very rapidly, and which aretherefore especially adaptedv for use in connection with the motors ofautomobiles.

In carrying out my invention I employ" outer and innerconcentriccylindrical walls,'

rings having concentric circular recesses into which the ends of saidwallsare fitted, bolts` for holding these parts together, water-tubessecured in the inner cylindrical wall, a steamdome in the upper part ofthe generator, a smoke-stack passing centrally through the saine, asteam-pipe leading frornthe steamdome, and connections from the interiorof the steam-dome to the upper' portion of the space between the saidconcentric cylindrical walls, all of which will be hereinafter moreparticularly described.

In the drawings, Figure 1 is a central vertical section of my improvedsteam-generator. Fig. 2 is a plan and 'partial section of the same; andFig. 3 is a section on line A B, Fi 1.

represents an outer cylindrical wall, and o. an inner cylindrical wallconcentric therewith.

` d and e are rings whose respective lower and upper surfaces areprovided with concentric circular recesses into which the upper andlower ends of the said walls c and a are Iitted. I employ bolts f, whichare passed through the ring d, between the walls c and a, and into thering e and are provided with nuts f, by which these parts are drawntogether and held in place. Y

b represents substantially U-shaped horizontally-placed water-tubeswhose ends are secured in the inner wall et by roaming, calking, orotherwise, so as to provide a watertight joint. These water-tubes arearranged .radially inward to the axis of the inner cy- Serial No.151,066. (No model.)

lindrical wall a and preferably vary in length, as shown in Fig. 3. Inorder to obtain a greater heating-surface, I prefer to make the bend inthe tubes somewhat greater than a semicircle. n

Interiorly of the inner wall a and above the uppermost water-tubes Iemploy an internal annulus-iiange 2. A steam-dome g is composed of threeparts and the sides of which fit within the inner cylindrical wall a, issupported by the internal annulus-flange `2, and is provided centrallywith a chimney or smoke-stack h, connected at its respective ends toparts of the steam-dome..

t represents pipe-sections connecting the interior of the steam-dome gto the upper portionfot` the space between the inner and outercylindrical walls a and c, and g' represents a steam-pipefor conveyingthe steam Yfrom the dome g.

Any suitable heating device, such as a petroleum-burner, may be employedbeneath the water tubes, and if the Water -level be maintained to keepthe upper tubes filled a Ycirculation will be established which willtend to prevent the format-ion of scale in the tubes.

It will be readily understood that by unscrewing the nutsf the outerwallc may be removed for the purposes of cleaning and repairs.

I claim as Iny invention- 1. A steam-generator comprising-a cylindricalouter wall, a cylindrical inner wall concentricwith the aforesaid wall,rings having concentric circular recesses into which the 85 ends Yofthesaid walls are fitted, bolts for yholding these parts together,substantially U shaped watertubes horizontally placed and secured in thein ner Wall, a steam-dome in the upper part of the generator, asmokestack passing centrally through the same, a steam-pipe leading fromthe steam-dome, and connections'from theinterior of the steamdome to theupper portion of the space between the said concentric cylindricalwalls.

2. A steam-generator comprising a cylindrical outer wall, a cylindricalinner wall concentric With the aforesaid wall, rings having concentriccircular recesses into which the l steam-dome with the space between thecyends of the said Walls are fitted, bolts for liudrical walls and anannulus-flange 2 actholding these parts together, substantially inglargely as a support for the steam-dome. U shaped Watertubeshorizontally placed In testimony that I claim the foregoing as 5 andsecured in the inner wall, a steam-dome my invention I have signed myname in presi5 in the upper part of the generator Within the ence of twosubscribing Witnesses.

cylindrical part a and composed of three FRIEDERICII WILHELM SCIIIRMER.parts g, a central smoke-stack h passing Witnesses: through andconnected to the steam-dome, Y. IMER,

Io pipe-sections 5 connecting the interior of the T. H. MUNICH.

